$ git clone -n https://src.fedoraproject.org/rpms/frobby.git /var/lib/mock/f39-build-1535672-36247/root/chroot_tmpdir/scmroot/frobby
Cloning into '/var/lib/mock/f39-build-1535672-36247/root/chroot_tmpdir/scmroot/frobby'...
$ git fetch origin dd9aa946739c4b3ac9d92f1caf4acb8096a75443:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frobby
 * [new ref]         dd9aa946739c4b3ac9d92f1caf4acb8096a75443 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd9aa94 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild